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Description: This is a 4-wire analog touch screen originally designed for the Nintendo DS. Add this touch screen to any LCD you want! Readings are taken by putting 5V across two of the pins and doing an analog to digital conversion on the other two pins. Full X and Y position can be achieved with only 4 GPIOs.

Check out our touchscreen tutorial!

Dimensions: 2.2 x 2.75"

Documents:

Comments 43 comments

  • Hi all,
    Hope this helps : I wrote a tutorial, with wiring schema and a working piece of code. If’s you’re interrested, with that you should see you touch position on your serial port within an hour.
    http://kalshagar.wikispaces.com/Arduino+and+a+Nintendo+DS+touch+screen

    • Thank you for the tutorial! It helped a lot.
      I would like to point out that the analogRead() method on the Arduino doesn’t know about pins 14-19; those pin numbers are only recognized when you want to use the analog pins with digitalOut().
      Japalan uses the “true” pin numbers (14-17) and then subtracts ‘14’ from those values when he uses analogRead() so that analogRead() gets numbers in the range it can deal with (0-3).
      Not all that hard but confused me for a bit…
      Also, I’m not quite getting full ranges of values. A touch at the very edge of the screen is giving me a reading of about 60 (out of 1024 max analog input). I’m wondering if it’s worth bounding these results…

  • Is this any different from the one at DealExtreme?
    The price over there is 4x less than SFE’s.
    http://www.dealextreme.com/details.dx/sku.3245

  • jamis: Also, I’m not quite getting full ranges of values. A touch at the very edge of the screen is giving me a reading of about 60 (out of 1024 max analog input). I’m wondering if it’s worth bounding these results…
    I ended up using this screen with Japalan’s resistive values and after bounding the results between 90 and 690 on the x-axis and between 120 and 720 on the y-axis, I was able to get a good 600x600 square of useable values.
    I may put up a PIC tutorial/example after I clean up some of the code I have. I wrote the code using the Picc Lite C compiler…

    • That would be great if you could post a tutorial, or even just your working code.
      Im trying to get this working on a PIC18f452 but its just a little over my head at the moment.
      cheers,

  • Anyone used one of these? which 2 pins are for 5V and which 2 do you take the readings from?

  • If you are carefully you can sold four thin wires to he connector. The consumption when applying 5v is about 6.5 to 12 mA, is a very versatile device and its prize cant be better!!!!

  • What I want to do is create a touch screen interface on a bathroom mirror (two way mirror with LCD behind it). I know I’ll have to fold wires around edge of mirror but I want to know how the ds screen itself looks on a mirror surface? With the LCD off, is the ds screen gonna be horribly obvious or will the mirror reflection hide it? Pics maybe from some with one?

  • “touch me” it said as it lay there waiting

  • Can this be used for multitouch applications?

  • Do you have to use a stylus? Can you use you finger?

    • Probably, considering the fact that I use my finger on my DS all the time, but it’s probably not very accurate.

  • To SparkFun staff, I’m interested in using the Touch Screen for commercial product development. As such, I’m worried about its availability when it comes to mass production. Do you mind revealing the manufacturer and part#? Thanks in advance!

  • Fun thing I just noticed: This matches up nearly perfectly with this B/W LCD, giving a potential $30 touchscreen!

    https://www.sparkfun.com/products/710

    • Or $12.50 if you don’t buy from Sparkfun. The LCD is 10.80 and the touchscreen is 1.64 on ebay, free shipping. I do like how in touch with the community Sparkfun is, but man can they gouge prices. Factor in eBay fees, shipping costs and profit margin, then one can assume that the eBay sellers are getting these for about 7 bucks and 99 cents respectively. If Sparkfun is getting them for the same price, they’re marking them up by 375% total for the pair and still charge shipping.

  • i want similar lcd but with greater dimensions nearly equal to 5"*5".

  • Your link to “How does it work?” is broken.

  • It works! A little tricky with a PIC micro though…
    http://www.youtube.com/watch?v=Xv2fuZ14lGk

  • Where can I find a part number?

  • Super fragile, I broke it as soon as I put it back in the box it came in… thin hairline cracks along one side.

  • I wrote something I regret. Please delete.

  • Anyone know how hard these can be pressed on (with a supportive backing)?
    I want to add pressure sensitivity to the assembly and I want to make sure this can withstand some meaty index finger jabs.

  • If anyone is interested I wrote a small, simple tutorial that shows how to get these working with Arduino - http://wp.me/pQmjR-1dL

  • Yes. The problem was that I got a bad touch screen. I ordered another and the new one behaves as expected. Linear in X and Y. The new one has about 1K resistance in the Y direction instead of 2K and about 350 Ohms resistance in the X direction instead of 300.

  • The breakout connector really DONT fits on the touchscreen connector, it don’t get contact and the board gets out of it with any LITTLE moving. Can’t read data…

  • I got one of these a few months ago and just started playing with it. The touch is very linear in the X direction (the short side) but is very non-linear in the Y direction. If I touch with a stylus about 1/5 of the way up the length (Y) the voltage varies based on where in X I touch. On the right hand side the voltage rises very quickly as I move in Y then not much at all near the top. On the left hand side the voltage rises linearly with distance. The only way for me to calibrate this away is by forcing the user to tap many points which makes it useless. <br />
    <br />
    Do I just have a bad screen or are they all like this? If it is just a bum part, I’ll order another and remember to fully test it out before letting it sit around.

  • djmitche: As a warning, this connector is very fragile. I managed to abrade the coating off the larger copper traces and solder to them, and had a working touch for a short while. But flexing that connector seems to weaken the copper trace, and now one of the traces is open, making the device pretty useless.<br />
    <br />
    Do yourself a favor and get one of these, too: http://www.sparkfun.com/commerce/product_info.php?products_id=9170
    <br /><br />
    <br />
    I did. Didn’t help much, the connector broke anyway. I IS fragile, I can confirm…

  • As a warning, this connector is very fragile. I managed to abrade the coating off the larger copper traces and solder to them, and had a working touch for a short while. But flexing that connector seems to weaken the copper trace, and now one of the traces is open, making the device pretty useless.
    Do yourself a favor and get one of these, too: http://www.sparkfun.com/commerce/product_info.php?products_id=9170

  • Ok this is for a Nintendo DS(NDS) LITE not NDS ok guys…
    Does anyone have a PINOUT for the NDS REGULAR?

  • It would be nice to have a breakout board for the MAX11800 to drive this thing. Nicer (digital) interface, better accuracy, and the MAX11800 is a pain to solder (TQFN package).

  • Will it work with 3v ?
    A datasheet would have been good…

  • @Tycho
    ARGH! I HATE that tutorial! It tells you to use resistors, etc. which are ABSOLUTELY not necessary. Here’s a better “tutorial” (The code explains what’s going on and how to wire, etc.), posted on the Arduino.cc forums:
    http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1243499684/7#2

  • I found a nice tutorial here on how to use this with the arduino.

  • Any idea what the size of this screen is (in pixels?) I’m trying to figure out a formula to determine the pixel location from the value of the analogRead().

  • Does anyone know if this will work if it is bent in a U shape? I want to use it with a display about half this size in a space-constrained device. I’m worried the bend area will produce false positive readings.

    • This thing is made up of two sheets of plastic. The top layer is thin and flexable but the backing is hard plastic. It feels like this thing will crack if it’s bent at all…

  • Does anyone know if this fits the LCD-00710?

  • It’s not strange that this type of touch screen requires four GPIOs. The four wires are from top, bottom, left and right side of the screen. While supplying 5V on the top side wire and 0V on the bottom side wire, you can sense the vertical position by analog voltage output of left and/or right wires.

  • Very nice find.. Any chance at getting a surface mount PCB connector for this part? Sweet.

    • If you use scissors very carefully on the connector, the leads spread enough to solder easily to any sort of adapter. I used a SSOP to dip adapter.

  • Why are four GPIOs needed? Seems to me that if your goal of using more than two lines is to conserve power by powering the device intermittently, you should only need three lines, right? Where’s the DATA SHEET?

  • Any idea what the power consumption is when applying the 5V?


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